摘要
血流速度剖面是研究血管特性的重要信息，它的得到通常用多道脉冲多普勒系统才能完成，由于脉冲多普勒系统存在着测速精度和测距精度的相互制约，且系统比较复杂，不太实用。文中提出一种新的估计方法，从超声多普勒血流音频信号出发，先得出其最大频率值和平均频率值，然后根据假设条件估计血流的速度剖面，从而使在一定精度上对血流速度剖面的估计成为可能。本文还给出了利用这种方法对血流速度剖面进行估计的一些结果。
lood flow velocity profiles are very useful in the research of vessel properties, and mul-ti-channel pulsed Doppler system is often needed to detect the blood flow velocity profile.This system is not always feasible because of restriction between velocity and depth measure-ment and complicatedness of the system.In this paper, we propose a method to obtain theblood flow velocity profile from the relationship among the maximum and mean frequency es-timated from Doppler shibt signals. Some results of blood flow velocity profiles estimatedwith this method are also presented.
出处
《中国生物医学工程学报》
CSCD
北大核心
1995年第4期344-350,共7页
Chinese Journal of Biomedical Engineering
关键词
血流流速
超声波
速度剖面
血管
Blood flow
Ultrasound
Doppler
Velocity profile
